module.exports = (err,ctx) => {
    let status = 500
    // 根据err.code传递更改status状态码
    switch (err.code) {
        case '10001':
            status = 400
            break;
        case '10002':
            status = 409
            break;
        default:
            status = 500
    }
    ctx.status = status
    ctx.body = err
}